LED light bars are known for their versatility and functionality. Whether you plan to install them on your vehicle, ATV or boat, they provide bright and efficient lighting, making it easier and safer for you to navigate in low-light conditions. For those who are new to LED light bars, understanding how to wire them can be a challenge. In this article, we will discuss the 3 wire LED light bar wiring diagram in detail to help you have a successful and stress-free installation.
What You Will Need
Before we get started, it is important to understand what you will need to successfully wire your LED light bar. Here is a list of materials that you will need:
| Materials | Tools |
|---|---|
| – LED light bar | – Wire stripper/cutter |
| – Wiring harness | – Electrical tape |
| – Relay | – Crimping tool |
| – Waterproof fuse holder and fuse | – Drill and bits |
| – Battery terminal (optional) | – Socket set/wrenches |
Wiring Diagram Overview
The wiring diagram for a 3 wire LED light bar is relatively simple. The three wires that make up the wiring harness are the positive wire, negative wire, and the yellow wire (or switch wire). The positive wire and negative wire are connected to your vehicle’s battery, while the yellow wire is connected to a switch that you can use to turn the light bar on and off. The relay is used to control the power to the light bar, ensuring that it turns on and off smoothly.
Step-by-Step Instructions
To wire your 3 wire LED light bar, follow these easy steps:
Step 1: Turn Off Your Vehicle’s Engine
Before you start wiring, make sure that your vehicle’s engine is turned off. This will help prevent any accidents when working with live electrical wires.
Step 2: Mount the LED Light Bar
Mount the LED light bar onto your vehicle. Depending on the make and model of your vehicle, you may need to use brackets or other mounting hardware to secure the light bar. Use a drill and bits to create holes on the mounting surface, then attach the brackets or hardware using screws or bolts.
Step 3: Connect the Wiring Harness
Connect the wiring harness to your LED light bar. You should be able to find a connection point at the back of the light bar. Once connected, route the wire harness towards your vehicle’s battery.
Step 4: Route the Yellow Wire to the Dashboard
Route the yellow wire (or switch wire) to the dashboard of your vehicle. This will allow you to easily access the switch when you need to turn the light bar on and off. Use zip ties or wire loom to secure the wire in place.
Step 5: Connect the Relay
Connect the relay to your vehicle’s battery. The positive wire on the relay should be connected to the battery’s positive terminal, while the negative wire should be connected to the battery’s negative terminal. The yellow wire from the wiring harness should be connected to the relay’s input terminal.
Step 6: Connect the Harness Wires to the Relay
The positive and negative wires from the wiring harness should be connected to the relay’s output terminals. Use a crimping tool to make a secure connection.
Step 7: Install the Fuse Holder
Install the waterproof fuse holder as close to the battery as possible. The fuse will protect your LED light bar from damage if there is a short circuit or other electrical problem. Place the fuse in the fuse holder, then connect the positive wire from the wiring harness to the fuse holder’s input terminal.
Step 8: Connect the Battery Terminal (Optional)
If you want to make your wiring look clean and professional, you can connect a battery terminal to your battery’s positive and negative terminals. This will make it easy to connect and disconnect your LED light bar without having to mess with the battery’s clamps.
FAQ
Q: Do I need to use a relay?
A: Yes, a relay is required when wiring an LED light bar. The relay ensures that the power to the light bar is controlled, preventing any electrical issues that may damage your light bar or your vehicle.
Q: What fuse size should I use?
A: The fuse size depends on the current draw of your LED light bar. Check the manufacturer’s specifications to determine the appropriate fuse size for your light bar. If you are unsure, it is always better to use a fuse that is slightly larger than what is recommended than to use one that is too small.
Q: Can I wire my LED light bar without a wiring harness?
A: While it is possible to wire your LED light bar without a wiring harness, it is not recommended. Wiring harnesses are designed to simplify the installation process and ensure that your light bar works properly.
Q: Can I connect my LED light bar directly to my vehicle’s battery?
A: While it is possible to connect your LED light bar directly to your vehicle’s battery, it is not recommended. Connecting your light bar directly to your battery bypasses the protections provided by a relay, which can lead to electrical issues and damage to your light bar, vehicle or both.
Q: What gauge wire should I use?
A: The gauge of wire you should use depends on the length of the wiring harness and the current draw of your LED light bar. In general, it is recommended to use a wire gauge that is rated for at least 10 amps.
Conclusion
Wiring your 3 wire LED light bar is a simple process. By following the steps and guidelines presented in this article, you can ensure that your installation is successful and stress-free. Remember to always prioritize safety and follow the manufacturer’s instructions for your specific LED light bar to ensure optimal performance.
